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4bxo

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Revision as of 17:45, 14 August 2019

Architecture and DNA recognition elements of the Fanconi anemia FANCM- FAAP24 complex

Structural highlights

4bxo is a 4 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Activity:	RNA helicase, with EC number 3.6.4.13
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

[FANCM_HUMAN] Fanconi anemia. The disease is caused by mutations affecting the gene represented in this entry.

Function

[FANCM_HUMAN] ATPase required for FANCD2 ubiquitination, a key reaction in DNA repair. Binds to ssDNA but not to dsDNA. Recruited to forks stalled by DNA interstrand cross-links, and required for cellular resistance to such lesions.^[1] ^[2] [REFERENCE:7][REFERENCE:8] [FAP24_HUMAN] Plays a role in DNA repair through recruitment of the FA core complex to damaged DNA. Regulates FANCD2 monoubiquitination upon DNA damage. Induces chromosomal instability as well as hypersensitivity to DNA cross-linking agents, when repressed. Targets FANCM/FAAP24 complex to the DNA, preferentially to single strand DNA.

Publication Abstract from PubMed

Fanconi anemia (FA) is a disorder associated with a failure in DNA repair. FANCM (defective in FA complementation group M) and its partner FAAP24 target other FA proteins to sites of DNA damage. FANCM-FAAP24 is related to XPF/MUS81 endonucleases but lacks endonucleolytic activity. We report a structure of an FANCM C-terminal fragment (FANCMCTD) bound to FAAP24 and DNA. This S-shaped structure reveals the FANCM (HhH)2 domain is buried, whereas the FAAP24 (HhH)2 domain engages DNA. We identify a second DNA contact and a metal center within the FANCM pseudo-nuclease domain and demonstrate that mutations in either region impair double-stranded DNA binding in vitro and FANCM-FAAP24 function in vivo. We show the FANCM translocase domain lies in proximity to FANCMCTD by electron microscopy and that binding fork DNA structures stimulate its ATPase activity. This suggests a tracking model for FANCM-FAAP24 until an encounter with a stalled replication fork triggers ATPase-mediated fork remodeling.

Architecture and DNA Recognition Elements of the Fanconi Anemia FANCM-FAAP24 Complex.,Coulthard R, Deans AJ, Swuec P, Bowles M, Costa A, West SC, McDonald NQ Structure. 2013 Aug 6. pii: S0969-2126(13)00255-4. doi:, 10.1016/j.str.2013.07.006. PMID:23932590^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Meetei AR, Medhurst AL, Ling C, Xue Y, Singh TR, Bier P, Steltenpool J, Stone S, Dokal I, Mathew CG, Hoatlin M, Joenje H, de Winter JP, Wang W. A human ortholog of archaeal DNA repair protein Hef is defective in Fanconi anemia complementation group M. Nat Genet. 2005 Sep;37(9):958-63. Epub 2005 Aug 21. PMID:16116422 doi:ng1626
↑ Mosedale G, Niedzwiedz W, Alpi A, Perrina F, Pereira-Leal JB, Johnson M, Langevin F, Pace P, Patel KJ. The vertebrate Hef ortholog is a component of the Fanconi anemia tumor-suppressor pathway. Nat Struct Mol Biol. 2005 Sep;12(9):763-71. Epub 2005 Aug 21. PMID:16116434 doi:10.1038/nsmb981
↑ Coulthard R, Deans AJ, Swuec P, Bowles M, Costa A, West SC, McDonald NQ. Architecture and DNA Recognition Elements of the Fanconi Anemia FANCM-FAAP24 Complex. Structure. 2013 Aug 6. pii: S0969-2126(13)00255-4. doi:, 10.1016/j.str.2013.07.006. PMID:23932590 doi:10.1016/j.str.2013.07.006

1 Structural highlights
2 Disease
3 Function
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/4bxo"

@@ Line 1: / Line 1: @@
 ==Architecture and DNA recognition elements of the Fanconi anemia FANCM- FAAP24 complex==
-<StructureSection load='4bxo' size='340' side='right' caption='[[4bxo]], [[Resolution|resolution]] 2.15&Aring;' scene=''>
+<StructureSection load='4bxo' size='340' side='right'caption='[[4bxo]], [[Resolution|resolution]] 2.15&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[4bxo]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4BXO OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4BXO FirstGlance]. <br>
@@ Line 25: / Line 25: @@
 __TOC__
 </StructureSection>
+[[Category: Large Structures]]
 [[Category: RNA helicase]]
 [[Category: Bowles, M]]

4bxo

From Proteopedia

Revision as of 17:45, 14 August 2019

Architecture and DNA recognition elements of the Fanconi anemia FANCM- FAAP24 complex

Structural highlights

Disease

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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